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How is water power produced?

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Water falling from one level to a lower one is used to drive machines like the water wheel and the turbine . The difference in height between the highest and the lowest level is called the head. The amount of work produced per pound of falling water is proportional to the head. Water power can be produced in this way from many natural sources, such as waterfalls and dammed rivers. Where no natural sources are available, an artificial reservoir can be made.

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